The one thing I like about superbeings like the Stranger? They seem to know every single other character in the DCU. It's not just his near-omniscience, he's really been around so much he knows who the right people are for each job. You see that sometimes with Supes and Bats, but the Stranger would even call on forgotten little guys to help out.
DC's got a wealth of cast-off C- through Z-listers, I wish they'd get more focus in compelling stories (though all these back-up series aren't a bad idea).